Q: What is a sealant?
A: A sealant is basically a viscous liquid that sets as a solid allowing it to be used as a barrier preventing water, smoke or dust getting in places they shouldn't. A classic example of a sealant being used around the home is a silicone waterproof sealant being used where the bath and the wall meet to stop water running into the gap causing problems such as leaks, damp and mould.
Q: How to apply roof sealant?
A: Roof Sealant normally comes in a paint tin and is applied by brush and when given 2- 3 coats it gives a waterproof seal and will extent the life of the existing roof. This is achieved because the roof membrane has elastic properties which allow it to expand and contract to its original shape without causing damage, it also reflects the the heat from the sun and protects from the weather.
Step by step guide to applying a roof sealant:
1. Inspect the roof for any cracks,tears or gaps as these will need fixing before any work can start.
2. Clean the roof using a pressure washer if available if not a stiff brush will do but make sure the moss and dirt are removed and the roof is clean enough to take the sealant. use a detergent then rinse thoroughly.
3. Leave the roof to dry completely.
4. Prime the roof to improve the adhesion for the final sealant coat.
5. Apply the Roof Sealant coat and allow to dry before adding another coat, apply 3 coats if necessary.
Q: How to remove silicone from clothes
A: A good way to remove the silicone from your clothes is to let the silicone harden and set and then it off. Remember not to spread the silicone too thinly or rub it into your fabric. this way it will peal off more easily. If your are still having problems try giving your clothes a good rub once the silicone has set.
Q: How to do silicone sealant remover?
A: Silicone Sealant Remover is normally made up of a thixotropic gel type substance used for removing unwanted cured silicone sealant. It will come as no surprise to hear that the silicone sealant remover is used in the refurbishment of sanitary ware, worktops, doors and window frames etc. if in doubt of what surfaces the remover can be used on always test the remover first on an inconspicuous place.
Firstly remove as much of the silicone as possible with a silicone removal tool of blade then smear the silicone sealant remover onto the remaining silicone generously and leave to penetrate for as long as the manufacturers instructions say then simple remove and wash down.
Q: What should be the Shelf life for each grade, and how you count the shelf life of sealents? Is that just counted after packing at China factory or counted after shipments reaches client's warehouse?
A: The shelf time for each sealant are 9 months. In fact, some factory mentioned that their products can keep for 12 months, we don’t do like that, we’re regular factory and should be responsible for our customers. It should stored at or below 27℃ in the original unopend containers, usable life of 9 month from the date of manufacture.
Q: What to do with the materials if it expires for Shelf life after importing from your company? Does it mean they can be recycled or can be used any other way to Mould, as for examples Rubber Mounded products, or one have to be destroyed if expired for shelf life? This is an important question from client here.
A: If the products are expired for shelf time, it means no use even sometimes you store in good condition and the products are valid we do not suggest you apply it. It is usually can not be recycled or make to be Mould. It’s up to you to destroy or not.
Q: If buy for 595ML/ 600 Grams Sausages, what will be the price for each grade compared to 300ML and drum packing?
A: Compared with 300ml cartridge, 590ml sausage one is cheaper than it because the pakage is cheaper.
And drum one is usually for two-component silicone sealant. If the customer need we can make for you with one-component sealant.
Q: Can you source for Automatic Cartridge Filling Machine for our client?
A: Yes, we can source for you because there is other customer also request for this. And our factory also need purchase it.
Q: Can you help us source for Cartridge making and printing machines or sources for cartridge suppliers from china?
A: Yes, we can. We have solid realation ship with somecartridge making and pringting machines suppliers in China. I'll check it for you, and give you the supplier's information when your client come.
Q: What should be the best Curing Time for Each grade of Silicon Sealent after applying in a cavity, seperately for Glass, STONE Facade as well as Composite Panels?
A: The best curing time for one component is 21 days, for two components 14days. It’ll be total sealed.
If you ask for track free time: for neutral silicone sealant is around one hour under the standard condition ( around 23℃,50%RH), for acid one it takes about 25minutes. It’s not according to the backing material but according to different sealant.
Q: How can the cure rate of silicone adhesives be shortened?
A: Silicone adhesives and sealants cure upon exposure to moisture. A particularly desirable cure cycle for silicone type adhesive/sealants involves exposure to 130-150°F and 95-100% relative humidity. Addition of moisture to the environment where the silicone bonding operation takes place, will greatly enhance the cure rate. Thinner sections of silicone adhesive/sealants cure faster than do thicker sections. A 1/8" thick section can cure within 24 hours. More time is required to fully cure thicker sections.
Q: How much adhesive is required for obtaining durable high strength bonds?
A: The amount of adhesive used should suffice to completely fill the gap between the two surfaces to be bonded. Use of excess adhesive is wasteful and requires an additional clean-up operation which further increases costs. Consult Master Bond for detailed recommendations.
Q: Does Baiyun offer electrically conductive adhesives?
A: Yes. Baiyun has developed a broad comprehensive line of electrically conductive adhesives which have very marked advantage over solder. Silver filled electrically conductive adhesives offer outstanding electrical conductivity as well as superior physical strength properties. Nickel filled systems are very economical to use and also have high physical strengths. Copper and graphite filled systems are also available for special uses. Electrically conductive two component adhesive formulations can be cured either at ambient or more quickly at various elevated temperatures. The one component systems must be cured at elevated temperatures.
Q: What Makes Silicones Special?
A: Silicones are the only organic/inorganic hybrid polymers that have been extensively commercialized. This is true for several important reasons.
The organic portion in poly(dimethylsiloxane) or PDMS – by far the most common silicone polymer – is the methyl group. The surface energy of any substance is a direct manifestation of the intermolecular forces between molecules. In the case of the methyl group, these forces are almost the weakest possible (only aliphatic fluorocarbon groups are lower).
The inorganic siloxane backbone is the most flexible polymer backbone available. This allows the methyl groups to be arranged and presented to their best effect. Consequently, PDMS provides one of the lowest-energy surfaces known. This results in a low-surface-energy polymer that can be bettered only by more expensive fluorocarbon polymers. It is this unique surface behavior that accounts for many silicone applications.
Adhesives, Emulsions, Antifoams, and Surfactants
In many applications it is critical for the silicone product to stick (adhere) to another material. Whether the silicone is used as a coating, sealant, or an adhesive, a low-surface-energy polymer is being “stuck” to another material, which is not an easy challenge. It is achieved by carefully designing and formulating silicone products that bond directly with the substrate.
Q: Can materials with different thermal expansion coefficients be effectively adhesively bonded?
A: Bonding substrates with such widely different thermal expansion coefficients as glass and aluminum or plastics and ceramics can be readily accomplished with properly selected adhesive compositions. Adhesives with compliant bond characteristics are the key for achieving high strength, durable bonds between such substrates. Baiyun offers quite a number of high strength structural adhesive compositions for such bonding requirements.
Q: How tight are bond line tolerances for assuring effective adhesive bonding?
A: Gap filling, solventless adhesive systems such as epoxies, polyurethanes and silicone materials are very tolerant of variations in bond line thickness. Master Bond formulations based on these and other polymer systems can produce high performance bonds with assemblies whose bonding surfaces have tolerances up to 20 mils and even more. Highest strengths are usually achieved when adhesive bonds range from 2-5 mils in thickness. Baiyun’s adhesive product line has been designed to offer optimal tolerances in permissible bond line thickness.
Q: How can the cure rate of silicone adhesives be shortened?
A: Silicone adhesives and sealants cure upon exposure to moisture. A particularly desirable cure cycle for silicone type adhesive/sealants involves exposure to 130-150°F and 95-100% relative humidity. Addition of moisture to the environment where the silicone bonding operation takes place, will greatly enhance the cure rate. Thinner sections of silicone adhesive/sealants cure faster than do thicker sections. A 1/8" thick section can cure within 24 hours. More time is required to fully cure thicker sections. Baiyun has developed a special silicone adhesive called MasterSil 711 which in thin sections solidifies in 3-5 minutes and cures significantly faster than do commercially marketed competitive products.
Q: How much adhesive is required for obtaining durable high strength bonds?
A: The amount of adhesive used should suffice to completely fill the gap between the two surfaces to be bonded. Use of excess adhesive is wasteful and requires an additional clean-up operation which further increases costs. Consult Baiyun Chemical for detailed recommendations.
Q: Are Baiyun Sealants available in special colors?
A: Baiyun Chemical can prepare its adhesives in most any desired color scheme. The specific color concentrates employed by Baiyun Chemical do not affect pertinent processing and performance parameters. Additionally Baiyun Chemical. offers a line of optically clear adhesives for use in optical and opto-electronic applications.
Q: What's the best way to remove silicone sealant smeared onto glass?
A: Try the methylated spirits (denatured alcohol) suggestion first. It's the mildest of the solvents suggested here. Lacquer thinner next--its alcohol with acetone and maybe a few other things. Goo gone is xylene-based and won't touch silicone. If nothing else works, MEK (methyl ethyl ketone) will remove the silicone, but it's pretty nasty. Turn on the bathroom fan and open all the windows. BTW, all these solvents are highly flammable.
