



Termination Technologies S391 Weatherproof Sealing Putty Compound 0.5kg Pack
S391
Termination Technologies S391 Weatherproof Sealing Putty – 0.5kg Pack, Permanently Soft & Flexible
The S391 from Termination Technologies is a single-part, non-sagging sealing compound designed for long-lasting protection in electrical installations. Supplied in a 0.5kg pack, it remains permanently soft and flexible, making it ideal for sealing and insulating around cables, glands, and enclosures.
- Multi-Purpose Sealing: Suitable for blocking and filling components such as junction boxes, couplers, switchgear, and transformers.
- Permanently Flexible: Remains soft and easy to mould with no hardening over time – ideal for maintenance access.
- Weatherproof & Non-Sagging: Designed to maintain form without exothermic reaction or slump during application.
- Chemical Resistant: Withstands oils, greases, water, detergents, mild acids, petrol, and more.
- Wide Temperature Range: Operates from -20°C to +85°C for indoor and outdoor environments.
Technical Specification
- Product Type: Weatherproof Sealing Putty
- Pack Size: 0.5kg
- Colour: Black
- Viscosity: Non-sagging, soft putty
- Operating Temperature: -20°C to +85°C
- Chemical Resistance: Oils, detergents, grease, water, caustic sodas, petrol, alcohols, mild acids
✅ Use the S391 sealing compound for flexible, weatherproof protection in a wide range of electrical and mechanical applications!

Product | Compound |
Type | Weatherproof Putty |
Delivery Options:
- PRIORITY DELIVERY – Next Working Day (All items in stock and ordered before 3 pm) - £7.08 inc-VAT. (£5.90 ex-VAT)
- Orders Over £100 (before VAT): We offer free standard shipping on all orders shipped to UK mainland addresses
- Orders under £100 (before VAT): Our standard delivery fee to UK mainland addresses is £5.90 ex-VAT (£7.08 inc-VAT)
*Delivery charges to JE, GY, TR, BT, IM, IV, HS, KW, ZE and certain PA post codes are £12 ex-VAT for all orders (Prices subject to change).
Items requiring specialist shipping:
- Orders containing Solar Panels, Batteries and/or Inverters: Up to 50 qty will be dispatched on a pallet and incur a £120 ex-VAT delivery charge**.
**Delivery charges to JE, GY, TR, BT, IM, IV, HS, KW, ZE and certain PA post codes are £180 ex-VAT (Prices subject to change).
Contact us if you have any further questions.