IOTA LSR 3663AB: Soft, Flame-Retardant Foam Silicone
Looking for a flexible, resilient, and easy-to-use foam material? Meet IOTA LSR 3663AB — a two-component, liquid addition-cure silicone foam that cures at room temperature into a soft, lightweight, and flame-retardant foam.
Perfect for sealing, cushioning, and filling applications, IOTA LSR 3663AB is widely used in producing silicone foam sealing strips, copier transfer roller sponge tubes, foam sheets, rolls, anti-vibration panels, printer roller tubes, and thermal insulation sleeves. It also serves as an excellent filling material for bags and various padded products.

Key Features:
Withstands temperatures up to 300°C
Foam expansion ratio: 2–6 times at room temperature
Soft, elastic, and ideal for shock absorption
Final density: 200–500 kg/m³

Easy to Process:
Simply mix components A and B at a 1:1 weight ratio. After thorough blending, the compound begins to foam and cures within 20–30 minutes at 25°C, forming a consistent semi-transparent foam.
Technical Highlights:
Viscosity: 20,000 ± 1,000 cps
Work time: 5–10 minutes at 25°C
Customizable viscosity, work time, and hardness available upon request

Packaging & Storage:
Available in 20kg, 25kg, or 200kg pails. Shelf life is 1 year when stored below 25°C.
Ideal for manufacturers seeking a reliable, ready-to-use foam silicone for damping, sealing, and insulation — IOTA LSR 3663AB delivers performance, safety, and ease.