image of Loctite 5990 Premium Silicone Copper Gasket Maker/Sealant

Item: 599712

Loctite 5990 Premium Silicone Copper Gasket Maker/Sealant


(Unit price: £0 per 100ml)

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  • Loctite 5990 Premium Silicone Copper

    The Loctite Ultra Copper Gasket Seal 5990 forms a flexible high temperature silicone seal. It is non corrosive and temperature resistant up to 350 degrees Centigrade.

    Loctite 5990 Premium Silicone Copper Extra Info

    • For flanges with permanent oil contact
    • Can be used for metal, plastic and painted parts
    • Low odour
    • Non-corrosive
    • Meets performance specs of OE silicone gaskets
    • Temperature resistance: -55°C to 350°C intermittent
  • Rated 4.5 out of 5 by 11 reviewers.
    Rated 1 out of 5 by Very bad product I will ask people not to buy can trust me this product is very bad..i just wasted my money on buying this can not stick to together with any particle..its sticking ability is really just messed up the surface wherever you put it.. 26 October 2015
    Rated 5 out of 5 by Excellent to supplement exhaust gasket I bought this product as the exhaust flange on my motorcycle engine was pitted and, despite trying to polish it, some deeper pits remained. Used it to supplement the exhaust gasket and it worked a treat. No exhaust gas leak at all even after 2000 miles. Strongly recommended. 29 April 2015
    Rated 4 out of 5 by 1978 Triumph T140v casing e.t.c Used instead of fiddly paper gaskets & as additional sump plug seal with respective copper washers. No leaks after a year. Highly recommend !!! 25 March 2015
    Rated 5 out of 5 by Oil cooler repair Used this product either side of copper washers at banjo unions on my bikes oil cooler. Superb first time fix!! 06 February 2015
    Rated 5 out of 5 by Loctite 5920 Worked a treat used on timing chain cover on V8 when rebuilding a competition Drift car 28 December 2014
    Rated 5 out of 5 by The ONLY exhaust sealant Having tried many various exhaust sealing solutions in the past, I can guarantee that the Loctite 5920/5990 is by far the best. It's superior bonding and heat resistance is fantastic and has NEVER let me down. I highly recommend this product and will myself continue to use it. 27 December 2014
    Rated 5 out of 5 by Great even for exhaust manifold!! I used the Loctite 5920 as a sealant on inlet manifold gasket and on exhaust (!!) manifold gasket in my Pajero 2.5 TD and I couldt be more happy. Perfect product and very good price. Thank you Halfords.. 18 October 2013
    Rated 5 out of 5 by No leaks Very surprised, read lots of comments warning against use of anything but the red stuff, but a month later and no leaks from my oil pan. Would reccomend. 14 July 2013
    • 2016-05-26 T14:57:33.254-05:00
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  • You can buy this product from one of our carefully selected Approved Partners. The full list of options available are below. Simply add your chosen option to your basket and proceed to checkout when you're ready.

    You can purchase products supplied by Halfords and selected other suppliers on

    Checkout is always via and all payment will be taken via In checkout the products will be split into separate deliveries for each supplier.

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    Price Seller Info Purchase

Some of the parts we sell here at Halfords have been reconditioned. These will carry a Refundable Deposit or an extra surcharge amount. When you add one of these reconditioned items to your basket, we'll add this extra cost automatically.

Once you've sent us your old item we'll check it over, and then refund you the full surcharge as long as everything is ok.

Before you return your old unit please make sure it's in re-serviceable condition. So if you're returning caliper casings, you'll need to double check they aren't badly damaged or broken. If the part you've sent is found to be unserviceable, we reserve the right not to refund the surcharge.

Please note that if you're returning your old unit to our National Returns Centre then this will be at your own expense.

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Loctite 5990 Premium Silicone Copper Gasket Maker/Sealant

£6 Loctite 5990 Premium Silicone Copper Gasket Maker/Sealant a flexible high temperature silicone seal