Insulating Glass Sealants
Insulating glass units use secondary seals in silicone and polysulfide. Anchored products include the JL868 silicone insulating glass sealant, the JL988 two-component structural silicone insulating glass sealant and the JPS223 professional IG polysulfide sealant. Confirm the unit design and compatibility with your primary seal before ordering.
Products in this range
The products below are described in the manufacturer's own words. Specifications beyond what is quoted here are not stated on this site; confirm any technical requirement for your application before ordering.
JL868 SILICONE INSULATING GLASS SEALANT

Manufacturer description: JL868 is a two part, high modulus, neutral cure silicone with excellent adhesion to glass and metal substrates use as a secondary sealing of insulating glass units.
Listed details: Typical Colors Part A: White
Features listed by the manufacturer:
- Features Outstanding UV resistance
- Neutral curing
- No corrosion non-toxic crosslinking system
Applications listed by the manufacturer: Secondary sealant in a dual-sealed insulating glass unit
Confirm colour, pack size and availability for this exact code before ordering.
JL988 2K Structural Silicone Insulating Glass Sealant

Manufacturer description: JL988 is a two-component structural silicone,high modules,neutral and room-temperature cured silicone structural sealant.It is especially for used as a secondary sealant in a dual-sealed insultaing glass unit which special used for the curtain.It has excellent unprimed adhesion to most building materials with high ultimate tensile strength
Listed details: Typical Colors Part A: White; Part B: Black
Features listed by the manufacturer:
- Features High movement ability Approved for structural applications High level of mechanical properties
Applications listed by the manufacturer: Structural glazing and curtainwall production Secondary sealant for insulating glass units used for fabrication of multi-layer inner-empty glass and composite stuffing for edges
Confirm colour, pack size and availability for this exact code before ordering.
JPS223 PROFESSIONAL IG POLYSULFIDE SEALANT

Manufacturer description: JPS223 is a two part, excellent air tightness, professional polysulfide sealant for insulating glass.
Listed details: Typical Colors Part A: Gray
Features listed by the manufacturer:
- Features Low moisture transmittance
- Excellent water oil and chemical resistance
Applications listed by the manufacturer: Especially formulated for manufacturing high quality insulating glass unit
Confirm colour, pack size and availability for this exact code before ordering.
Questions to confirm for your order
- Confirm the exact product code, colour and pack size for your order.
- Confirm the minimum order quantity and lead time for your quantity.
- Confirm which documents you need with the shipment. Certificates available upon request.
- Confirm suitability for your substrate and application in writing before ordering.
Frequently asked questions
Which product code should I choose?
For insulating glass sealants, the code matters more than the generic type: colour, pack size and published description differ by code. Compare the quoted descriptions on this page, then confirm your shortlist by inquiry.
What colours and pack sizes are available?
Colours and pack sizes are stated per product code in the manufacturer's listings where published. Where they are not stated, ask for them in your inquiry before ordering.
Can I get a sample before a bulk order?
Ask about samples in your inquiry, together with the product code, colour and quantity you need. Samples let you check colour, adhesion and handling on your own substrates before committing to volume.
Related pages
Confirm before you order
Before ordering, ask about the following for the exact product you need: product code and colour, pack size, minimum order quantity, lead time, and the documents you need with the shipment. Certificates available upon request. Email [email protected] to ask whether your requested products and documents are available.